Tax law enforcement is also very unsuccessful, a company can evade millions of taxes by simply setting up a bank account in switzerland and wiring all that money there. This however only works as long as the existence of such an account is kept secret, I hacked into such a company once and readed in their mails how they did it. This company made around 2mio € profit a year and payed only 1k € taxes, because according to their tax declaration they were only making 20k € a year, heck they payed their "tax accountant" even more than they payed taxes itself. I sent evidence anonymously to interpol, the tax enforcement in switzerland, austria and germany, but they didn't even respond. I guess they just don't care.